For what its worth, monitoring battery voltage in the data logs only one tenth of change from 13.5 13.6 occured. I do run a relay to the fuel pump and the grounds are real good. I tied the whole car together with 4 10guage multistrand wires lugged into a 4 guage lug terminals and mounted them everywhere. The fuel pump pulls power through isolated 8 guage wires directly from the battery back to the terminals on the relay in the back of the car.
The log did show an average of 175 deg of coolant temp. At that temperature if Im running a 180 tstat isn't it closed. The water temp had to be close to 10 degrees colder last week.
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